Fritz Büsching

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Fritz Büsching (born July 26, 1940 in Goslar ) is a German engineering scientist . He succeeded for the first time in demonstrating resonance absorption in the interaction of wind waves with partially standing waves in basin formations .

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In 1961 Büsching passed his Abitur at the Hoffmann-von-Fallersleben Gymnasium in Braunschweig. Until 1968 he studied civil engineering at the Technical University there, from which he graduated with the degree of Diplomingenieur (Dipl-Ing.). From 1968 to 1971 he worked as a project engineer and structural engineer in hydraulic steelwork at Fried. Krupp GmbH, industrial and steel construction, active in Rheinhausen. With the appointment of Prof. Dr.-Ing. Alfred Führböters took up the chair for hydromechanics and coastal hydraulic engineering at the TU Braunschweig in 1971, Büsching became its first scientific assistant. In addition to holding independent courses, he completed his dissertation on the subject of " orbital speeds of irregular surf waves" on the basis of nature measurements carried out on the west coast of the island of Sylt and was awarded a Dr.-Ing. appointed. From 1976 to 1983 Büsching was chief engineer and head of the hydraulic steel and offshore construction department at the Leichtweiß Institute for Hydraulic Engineering at the TU Braunschweig. After the award of habilitation-equivalent achievements in 1978, he was also professor of hydromechanics and coastal water engineering under corporate law .

In 1984 Büsching was appointed professor for hydromechanics and hydraulic engineering at the Bielefeld University of Applied Sciences . After the hydraulics laboratory at the university site in Minden was expanded according to his ideas into a laboratory for hydromechanics and hydraulic engineering in 1987, Büsching developed his research ideas - especially with regard to wave absorption by the "hollow revetments" he designed - with investigations in a combined flow and wave channel. In 1991 and 1992 he was also a lecturer for hydraulic steel construction at the Institute for Steel Construction at the TU Braunschweig.

Activities and services

Büsching worked for Fried in hydraulic steelwork. Krupp GmbH Industrie- und Stahlbau is involved in the execution of major hydraulic engineering projects, such as the Eider barrage , the Lüneburg ship lift and dam construction projects in South America and Africa. As a scientific assistant at the Technical University of Braunschweig, he made a significant contribution to the establishment of the chair for hydromechanics and coastal water engineering, in particular by taking on self-responsible teaching assignments that dealt with hydromechanics , hydraulic steel engineering and marine and offshore engineering. As early as the early 1970s, Büsching was the first to use almost exclusively automatic systems for the storage and analysis of the storm wave data he had collected on the west coast of Sylt, so that reliable data were available not only as the basis for his dissertation, but also for later work. In 1978, Büsching was able to present spectra of the phase velocities of ocean waves for the first time, demonstrating that the phase velocities for the selected measurement location - contrary to the classic dispersion relation - are subject to an anomalous dispersion (dc / df> 0).

Since 1976, he has worked as the responsible department head at the Leichtweiß Institute in the field of application-oriented research on a large number of reports and research assignments, the subjects of which relate to the entire field of hydraulic engineering and water management. He was a member of the Collaborative Research Centers 79 (water research in the coastal area) and 205 (coastal engineering) of the DFG and responsible head of two large field research programs "Sea swell forces on offshore structures" (sponsor: BMFT) and "Wave forces on lake structures in shallow water areas" (SFB 79 the DFG). In 1979 Büsching first used Doppler terminology to describe the movement of surf waves and the wave transformation in accelerated carrier media. Since the 1980s, at the TU Braunschweig and later as a professor at the University of Applied Sciences in Bielefeld, he has primarily devoted himself to the theoretical and practical problems of wave development and the wave load on coastal protection and offshore structures. In 1990, Büsching described for the first time a resonance effect between the waves breaking on an embankment (as exciters ) and the washing movement generated by them on the embankment (as a resonator ). For this he later uses the term “surf resonance”, knowing full well that the exciter and resonator can also be viewed as components of a coupling oscillation .

A European patent for a river bank protection structure ("hollow revetment"), with which the "surf resonance" is influenced in the sense of minimizing the wave loads, was granted to him in 1996.

After the phenomenon of anomalous dispersion also appeared in measurements in the wave channel of the Laboratory for Hydromechanics and Hydraulic Engineering, Büsching came to the realization in 2003 that both the laboratory waves in question and the waves measured on the west coast of Sylt are resonant tank oscillations acts. The latter arise from the fact that the water volume, which is partially delimited between the reef parallel to the beach and the beach, comes into resonance with the exciting wind waves . Since he suspects that such wave resonances were the main cause of the strong wave attack on the island of Sylt in the past , he proposed the arrangement of partially permeable underwater structures on or above the reef to dampen the waves. After Büsching encountered the phenomenon of the phase jump (phase shift between incident and reflected wave) while investigating the reflection (physics) of irregular water waves on steep bank embankments , he defined the reflection coefficient for water waves as a complex quantity = on the basis of measurements carried out in 2011 . Accordingly, the wave height ratio previously defined as the reflection coefficient becomes the absolute value of the complex reflection coefficient, while the argument Δφ describes the phase difference occurring between the incident and reflected waves.

From 1974 to 2012 he contributed to a large number of international conferences on the topic of coastal engineering and offshore engineering.

Fonts (selection)

  • Publications on hollow-cubes.de
  • Fritz Büsching: HOLLOW CUBES - Hollow moldings that can be flowed through as components of wave-loaded embankment covers - , HANSA - International Maritime Journal - C 3503 E, 138, H. 10 pp. 62–65, 2001.
  • Fritz Büsching: STORM WAVE RESONANCE CONTROLLED BY HOLLOW BLOCK STRUCTURES. COPEDEC VI, Colombo, Sri Lanka; Book of Abstracts: “Hollow Blocks for the Protection of a Ridge Coast” pp. 179-180, CD Proceedings: Paper No. 90 pp. 1-20, 2003.
  • Fritz Büsching: STORMWAVE RESONANCE ON THE WEST COAST OF THE ISLAND OF SYLT. in: The coast. Issue 67, pp. 51-82, 2003.

Web links

Individual evidence

  1. ↑ Patent EP0451521 : Bank protection structure. Registered on April 10, 1990 , published on July 24, 1996 , inventor: Fritz Büsching. ‌
  2. ↑ Hollow Cubes on hollow-cubes.de
personal data
SURNAME Büsching, Fritz
BRIEF DESCRIPTION German engineering scientist
DATE OF BIRTH July 26, 1940
PLACE OF BIRTH Goslar